CN218698098U - Clamping tool - Google Patents

Abstract

The utility model relates to the technical field of clamps, in particular to a clamping tool which comprises a workbench, a first clamping component, a second clamping component and a switching component, wherein the workbench is provided with a working position used for placing a workpiece; the first clamping assembly can clamp or release the workpiece in a first direction; the second clamping assembly can clamp or release the workpiece in a second direction; the opening and closing assembly comprises a cam, the cam can rotate between an opening position and a fixing position, and the first clamping assembly and the second clamping assembly are both in a releasing state under the condition that the cam is located at the opening position; the first direction is perpendicular to the second direction. Above-mentioned setting makes the operation process only need the cam to rotate certain angle can realize the control to first centre gripping subassembly and second centre gripping subassembly, only needs once operation can accomplish the centre gripping to two directions of work piece, has improved the work efficiency that the work piece was placed and was taken out, and has reduced the amount of labour.

Description

Clamping tool

Technical Field

The utility model relates to an anchor clamps technical field especially relates to a centre gripping frock.

Background

In the production process of products, the surfaces of the products are often machined, and the products need to be clamped by using a clamp during machining, so that the products are prevented from being damaged due to displacement in the machining process.

To the product of cuboid structure, current centre gripping frock generally is equipped with the holder of two directions, through carrying out the exclusive operation respectively to two holders for two holders can keep away from or be close to the product and accomplish the centre gripping or the release to the product. Above-mentioned clamping structure makes when placing the product or taking out the product at every turn, needs to operate two holders alone, leads to the centre gripping of product and places inefficiency, and intensity of labour is big. In addition, the clamping sequence of the two clamping pieces is easy to be disordered, so that the product cannot be correctly clamped, the clamping effect is influenced, and the product is influenced.

Therefore, a clamping tool needs to be researched to solve the problems that the clamping and placing efficiency of a product is low and the labor intensity is high due to the fact that two clamping pieces need to be independently operated in the process of taking and placing the product every time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centre gripping frock to solve and get the product process at every turn and need be to two holders independent operation, lead to the centre gripping of product and place inefficiency, and the big problem of intensity of labour.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a centre gripping frock, this centre gripping frock includes:

the workbench is provided with a working position, and the working position is used for placing a workpiece;

a first clamping assembly capable of clamping or releasing the workpiece in a first direction;

a second clamping assembly capable of clamping or releasing the workpiece in a second direction;

the opening and closing assembly comprises a cam, the cam can rotate between an opening position and a fixing position, and the first clamping assembly and the second clamping assembly are both in a releasing state under the condition that the cam is located at the opening position; when the cam is located at the fixed position, the first clamping assembly and the second clamping assembly are both in a clamping state;

the first direction is perpendicular to the second direction.

As a preferred technical scheme of the clamping tool, the workbench is provided with a first stop portion, the first clamping assembly comprises a first clamping piece, and the first clamping piece is arranged on the workbench in a sliding manner along the first direction and can be close to or far away from the first stop portion; and

the workbench is provided with a second stopping portion, the second clamping assembly comprises a second clamping piece, and the second clamping piece is arranged on the workbench in a sliding mode along the second direction and can be close to or far away from the second stopping portion.

As a preferred technical solution of the clamping tool, the first clamping assembly includes a first elastic member, and the first elastic member is disposed between the first clamping member and the workbench and is used for making the first clamping member approach the first stopping portion; and

the second clamping assembly comprises a second elastic piece, and the second elastic piece is arranged between the second clamping piece and the workbench and used for enabling the second clamping piece to be close to the second stopping part;

the second elastic member provides an elastic force less than an elastic force provided by the first elastic member.

As a preferred technical scheme of the clamping tool, the opening and closing assembly comprises a first lever, the first lever is rotatably arranged on the workbench and used for shifting one end of the first lever, and the other end of the first lever can drive the first clamping piece to be far away from the first stopping part; and

the opening and closing assembly comprises a second lever, the second lever is rotatably arranged on the workbench and used for shifting one end of the second lever, and the other end of the second lever can drive the second clamping piece to be far away from the second stopping portion.

As a preferred technical scheme of the clamping tool, one end of the first lever is provided with a first toggle pin, the first clamping piece is provided with a first toggle groove, and the first toggle pin is partially positioned in the first toggle groove and can be abutted against the groove wall of the first toggle groove; and/or

And a second poking pin is arranged at one end of the second lever, a second poking groove is formed in the second clamping piece, and the second poking pin is partially positioned in the second poking groove and can be abutted against the groove wall of the second poking groove.

As a preferred technical scheme of the clamping tool, the workbench is provided with a first sliding chute, the first clamping piece is slidably arranged in the first sliding chute, and the first cover plate is arranged on the workbench and covers a notch of the first sliding chute; and/or

The workstation is equipped with the second spout, the second holder slides and locates in the second spout, the second apron is located the workstation, and the lid is located the notch of second spout.

As a preferred technical scheme of the clamping tool, the cam comprises a rotating shaft, and a first approaching portion, a first far portion, a second approaching portion and a second far portion which are sequentially arranged in the circumferential direction of the rotating shaft in a winding manner, wherein the first far portion drives the first clamping assembly to release the workpiece, and the second far portion drives the second clamping assembly to release the workpiece in the state that the cam is located at the opening position; the cam is located under the state of fixed position, first portion of being close to drives first centre gripping subassembly presss from both sides tightly the work piece, the portion is close to the second drives second centre gripping subassembly presss from both sides tightly the work piece, the first portion of being close to with the first circular arc radius of keeping away from between the portion is greater than the second portion of being close to with the second is kept away from the circular arc radius of keeping away from between the portion.

As a preferred technical scheme of a centre gripping frock, the switching subassembly includes the handle, the handle is located on the axis of rotation, be used for stirring the cam is in open position with rotate between the fixed position.

As a preferred technical scheme of a centre gripping frock, the switching subassembly includes drive assembly, drive assembly locates the workstation is used for the drive the cam rotates.

As an optimal technical scheme of a centre gripping frock, drive assembly includes driving piece, rack and gear, the driving piece is located the workstation, the rack is followed the second direction slides and locates the workstation, and with the output transmission of driving piece is connected, the gear is located the input of cam, and with rack toothing.

The utility model has the advantages that:

the utility model provides a centre gripping frock, this centre gripping frock can rotate between open position and fixed position through the cam in the switching subassembly to can drive first centre gripping subassembly and the release of second centre gripping subassembly or press from both sides tight work piece, operation process only needs the cam to rotate certain angle and can realize the control to first centre gripping subassembly and second centre gripping subassembly, only need once operation can accomplish the centre gripping to two directions of work piece, the work efficiency that the work piece was placed and was taken out has been improved, and the amount of labour has been reduced.

Drawings

Fig. 1 is a schematic structural view of a clamping tool and a workpiece in an embodiment of the present invention;

fig. 2 is a schematic structural view of the clamping tool in the embodiment of the present invention, in which the first cover plate and the second cover plate are hidden;

fig. 3 is a schematic structural view of a clamping tool in an embodiment of the present invention, clamping a workpiece;

fig. 4 is a schematic structural view of the clamping tool in the embodiment of the present invention, releasing the workpiece;

fig. 5 is a schematic structural view of a clamping tool according to an embodiment of the present invention, including a driving assembly;

fig. 6 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention.

In the figure:

100. a workpiece; 101. a first positioning hole; 102. a second positioning hole;

x, a first direction; y, a second direction;

1. a work table; 11. a first stopper portion; 12. a second stopper portion; 13. a first chute; 14. a second chute; 15. a first positioning projection; 16. a second positioning projection; 17. a base; 18. a support bar; 19. a limiting groove;

2. a first clamping assembly; 21. a first clamping member; 211. a first toggle groove; 22. a first elastic member; 23. a first cover plate;

3. a second clamping assembly; 31. a second clamping member; 311. a second toggle groove; 32. a second elastic member; 33. a second cover plate;

4. an opening and closing assembly; 41. a cam; 410. a rotating shaft; 411. a first approach portion; 412. a first remote portion; 413. a second approach portion; 414. a second remote portion;

42. a first lever; 420. a first rotating shaft; 421. a first toggle pin; 422. an avoidance groove;

43. a second lever; 430. a second rotating shaft; 431. a second toggle pin;

44. a drive assembly; 441. a drive member; 442. a rack; 4421. a fixed block; 443. a gear; 444. a first limit piece; 445. a second limiting member; 446. a first stopper; 447. a second limiting block; 45. a handle; 451. and a limiting bulge.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 6, the present embodiment provides a clamping tool, which includes a workbench 1, a first clamping assembly 2, a second clamping assembly 3, and an opening and closing assembly 4, wherein the workbench 1 is provided with a working position, and the working position is used for placing a workpiece 100; the first clamping assembly 2 is capable of clamping or releasing the workpiece 100 in a first direction X; the second clamping assembly 3 can clamp or release the workpiece 100 in the second direction Y; the opening and closing assembly 4 comprises a cam 41, the cam 41 can rotate between an opening position and a fixing position, and in the state that the cam 41 is located at the opening position, the first clamping assembly 2 and the second clamping assembly 3 are both in a releasing state, namely, the first clamping assembly 2 and the second clamping assembly 3 both release the workpiece 100; when the cam 41 is located at the fixed position, the first clamping assembly 2 and the second clamping assembly 3 are both in a clamping state, that is, the first clamping assembly 2 and the second clamping assembly 3 both clamp the workpiece 100; the first direction X is perpendicular to the second direction Y.

This centre gripping frock can rotate between open position and fixed position through the cam 41 in the switching subassembly 4 to can drive first centre gripping subassembly 2 and the release of second centre gripping subassembly 3 or press from both sides tight work piece 100, the operation only needs cam 41 to rotate certain angle and can realize the control to first centre gripping subassembly 2 and second centre gripping subassembly 3, only need once to operate can accomplish the centre gripping or the release to two directions of work piece 100, the work efficiency that work piece 100 placed and taken out has been improved, and the amount of labour has been reduced.

Optionally, the working table 1 is provided with a first positioning protrusion 15 and a second positioning protrusion 16, the workpiece 100 is provided with a first positioning hole 101 and a second positioning hole 102, the first positioning protrusion 15 can be inserted into the first positioning hole 101, and the second positioning protrusion 16 can be inserted into the second positioning hole 102. The first positioning protrusion 15 is a long strip, the second positioning protrusion 16 is a cylinder, the first positioning hole 101 is matched with the first positioning protrusion 15 in shape, the first positioning hole is a long strip, and the second positioning hole 102 is matched with the second positioning protrusion 16 in shape, and the second positioning hole is a circular hole. The above arrangement can achieve the foolproof effect.

In addition, the bottom surface of the working position is provided with three supporting pieces, wherein two supporting pieces are positioned at one end of the working position, and one supporting piece is positioned at the other end of the working position. The workpiece 100 is placed on three supports.

In this embodiment, the workbench 1 is provided with a first stopping portion 11, the first clamping assembly 2 includes a first clamping member 21, and the first clamping member 21 is slidably disposed on the workbench 1 along the first direction X and can be close to or far away from the first stopping portion 11. The workbench 1 is provided with a second stopping portion 12, the second clamping assembly 3 comprises a second clamping member 31, and the second clamping member 31 is slidably disposed on the workbench 1 along the second direction Y and can be close to or far away from the second stopping portion 12. This arrangement enables the workpiece 100 to be clamped and facilitates the provision of a large clamping surface at the first clamping member 21 and the second clamping member 31, avoiding a large pressure on the workpiece 100.

The opening and closing assembly 4 includes a first lever 42, the first lever 42 is rotatably disposed on the working platform 1 through a first rotating shaft 420, one end of the first lever 42 is pulled, and the other end of the first lever 42 can drive the first clamping member 21 to be away from the first stopping portion 11. The provision of the first lever 42 to draw the drive end of the first clamping member 21 out of the way and avoid the power member acting directly on the first clamping member 21, facilitates the layout and optimisation of the power member.

The opening and closing assembly 4 includes a second lever 43, the second lever 43 is rotatably disposed on the working platform 1 through a second rotating shaft 430, one end of the second lever 43 is pulled, and the other end of the second lever 43 can drive the second clamping member 31 to move away from the second blocking portion 12. The provision of the second lever 43 draws the driving end of the second clamping member 31 out of the way, avoiding the power member acting directly on the second clamping member 31, and facilitating the layout and optimisation of the power member.

The first clamping assembly 2 includes a first elastic member 22, and the first elastic member 22 is disposed between the first clamping member 21 and the workbench 1, and is used for making the first clamping member 21 approach the first stopping portion 11. The second clamping assembly 3 includes a second elastic member 32, and the second elastic member 32 is disposed between the second clamping member 31 and the working platform 1, for making the second clamping member 31 approach the second stopping portion 12. The arrangement of the first elastic member 22 and the second elastic member 32 allows the clamping force of the workpiece 100 to be easily controlled, and the situation that the workpiece 100 is damaged due to excessive clamping force does not occur.

When the workpiece 100 is clamped, once sliding friction occurs between the clamped portion and the workpiece 100, the clamping surface of the workpiece 100 is affected, and even the clamped surface of the workpiece 100 is determined to be defective after being scratched, which results in a reduction in the yield of the workpiece 100. Because the position for placing the workpiece 100 is generally larger than the corresponding dimension of the workpiece 100 in the width and length directions, in the clamping process, after the first clamping member 21 and the first stopping portion 11 clamp the workpiece 100 first, the second clamping member 31 clamps the workpiece 100 in the clamping process, the workpiece 100 may have a certain displacement in the second direction Y, at this time, friction may occur between the workpiece 100 and the first clamping member 21 and the first stopping portion 11, or in another case, in the clamping process, after the second clamping member 31 and the second stopping portion 12 clamp the workpiece 100 first, the first clamping member 21 clamps the workpiece 100 in the clamping process, and the workpiece 100 may have a certain displacement in the first direction X, at this time, friction may occur between the workpiece 100 and the second clamping member 31 and the second stopping portion 12, the best working state is to finish the clamping action on the workpiece 100 in two directions simultaneously, but the case is an ideal state, and cannot be realized in reality.

Therefore, in this embodiment, when designing the clamping tool, the forces of the two clamping members in the tool need to be distinguished, specifically, the first clamping assembly 2 includes the first elastic member 22, the first elastic member 22 is disposed between the first clamping member 21 and the workbench 1, and is used for making the first clamping member 21 approach the first stop portion 11, the second clamping assembly 3 includes the second elastic member 32, the second elastic member 32 is disposed between the second clamping member 31 and the workbench 1, and is used for making the second clamping member 31 approach the second stop portion 12, and the elastic force provided by the second elastic member 32 is smaller than the elastic force provided by the first elastic member 22. With the above arrangement, when the workpiece 100 is installed, the second clamping assembly 3 can be operated first, so that the second clamping member 31 and the second stopping portion 12 clamp the workpiece 100, the workpiece 100 is moved to the right in the second direction Y, and then the first clamping assembly 2 is operated, so that the first clamping member 21 and the first stopping portion 11 clamp the workpiece 100. Of course, in other embodiments, two opposing faces of the workpiece 100 that do not have finish requirements may be aligned with the second clamp 31.

In the operation process, the operator can avoid the mixed condition, after the product is placed, operate first clamping component 2 earlier, make first clamping piece 21 and first backstop portion 11 press from both sides tight work piece 100, then operate second clamping piece 31, at this moment, because the dynamics of first elastic component 22 is great, in second clamping piece 31 centre gripping process, work piece 100 can appear great frictional force with between first clamping piece 21 and the first backstop portion 11 when moving along second direction Y, and then produce comparatively serious wearing and tearing to work piece 100.

For this reason, in this embodiment, optionally, the cam 41 includes a rotating shaft 410, and a first approaching portion 411, a first departing portion 412, a second approaching portion 413, and a second departing portion 414 that are sequentially disposed around the rotating shaft 410, where in a state where the cam 41 is located at the open position, the first departing portion 412 drives the first clamping assembly 2 to release the workpiece 100, and the second departing portion 414 drives the second clamping assembly 3 to release the workpiece 100; when the cam 41 is located at the fixed position, the first approaching portion 411 drives the first clamping assembly 2 to clamp the workpiece 100, the second approaching portion 413 drives the second clamping assembly 3 to clamp the workpiece 100, and the radius of the arc between the first approaching portion 411 and the first far portion 412 is larger than the radius of the arc between the second approaching portion 413 and the second far portion 414. With the above arrangement, during the rotation of the cam 41 from the open position to the fixed position, the second clamping assembly 3 is actuated first and the first clamping assembly 2 is actuated later. Wherein, the arc radius between the first close part 411 and the first far part 412 is 4mm-5mm, and the arc radius between the second close part 413 and the second far part 414 is 1mm-1.5mm.

Specifically, in a state where the cam 41 is located at the open position, the first distant portion 412 abuts against a side surface of the other end of the first lever 42, the first holding member 21 is distant from the workpiece 100, the second distant portion 414 abuts against a side surface of the other end of the second lever 43, the second holding member 31 is distant from the workpiece 100, in a state where the cam 41 is located at the fixed position, the first near portion 411 abuts against a side surface of the other end of the first lever 42, the first holding member 21 clamps the workpiece 100 by the first elastic member 22, the second near portion 413 abuts against a side surface of the other end of the second lever 43, and the second holding member 31 clamps the workpiece 100 by the second elastic member 32.

Of course, in other embodiments, the connection relationship between the cam 41 and the lever may also be that two arc-shaped sliding grooves are arranged on the cam 41, the radii of the two arc-shaped sliding grooves are different, and the first lever 42 and the second lever 43 are respectively provided with two pin shafts, and the two pin shafts are respectively inserted into the two arc-shaped sliding grooves.

Wherein the first lever 42 is provided with an avoiding groove 422, and the second lever 43 passes through the avoiding groove 422, the arrangement enables the overall thickness of the first lever 42 and the second lever 43 to be reduced.

Regarding the connection relationship between the first lever 42 and the first clamping member 21, in this embodiment, one end of the first lever 42 is provided with a first toggle pin 421, the first clamping member 21 is provided with a first toggle groove 211, and the first toggle pin 421 is partially located in the first toggle groove 211 and can abut against the groove wall of the first toggle groove 211. The first toggle groove 211 can be an arc groove or a square groove, preferably a square groove, and the square groove can adapt to the motion track of the first toggle pin 421; on the other hand, the mass of the first clamping piece 21 can be reduced, and the cost is reduced.

Regarding the connection relationship between the second lever 43 and the second clamping member 31, in this embodiment, one end of the second lever 43 is provided with a second toggle pin 431, the second clamping member 31 is provided with a second toggle groove 311, and the second toggle pin 431 is partially located in the second toggle groove 311 and can abut against the groove wall of the second toggle groove 311. The second toggle groove 311 may be an arc groove or a square groove, preferably a square groove, and the square groove can adapt to the movement track of the second toggle pin 431; on the other hand, the mass of the second clamping piece 31 can be reduced, and the cost is reduced.

Of course, in other embodiments, the connection relationship between the first lever 42 and the first clamping member 21 is also other ways, for example, the first lever 42 is provided with a sliding slot extending along the length direction of the first lever 42, and the first clamping member 21 is provided with a fixing column inserted in the sliding slot. The connection mode of the second lever 43 and the second clamping member 31 can refer to the connection mode of the first lever 42 and the first clamping member 21, the above description is only an example, and in other embodiments, the connection mode is not limited as long as the connection mode can not generate movement interference after the connection of the two.

In this embodiment, the workbench 1 is provided with a first sliding chute 13, the first clamping member 21 is slidably disposed in the first sliding chute 13, the first cover plate 23 is disposed on the workbench 1, and the first cover plate covers the opening of the first sliding chute 13. Above-mentioned first apron 23 and the components of a whole that can function independently setting of workstation 1 have improved production and installation effectiveness on the one hand, and the first apron 23 of on the other hand and first spout 13 form sliding channel for the slip space of first holder 21 receives the protection, avoids debris to block, is favorable to sliding smoothly. Similarly, the workbench 1 is provided with a second sliding chute 14, the second clamping piece 31 is slidably disposed in the second sliding chute 14, the second cover plate 33 is disposed on the workbench 1, and the second cover plate covers the notch of the second sliding chute 14.

In this embodiment, the workbench 1 is provided with a first through hole and a second through hole, the first through hole is disposed in the first sliding groove 13 and communicated to the back of the workbench 1, the second through hole is disposed in the second sliding groove 14 and communicated to the back of the workbench 1, the first toggle pin 421 and the second toggle pin 431 respectively pass through the first through hole and the second through hole and then are inserted into the first toggle groove 211 and the second toggle groove 311, and the first lever 42 and the second lever 43 are both located on the back of the workbench 1. The arrangement ensures that the table top of the workbench 1 has simple structure and convenient operation.

Optionally, the opening and closing assembly 4 comprises a handle 45, the handle 45 being provided on the rotation axis 410 of the cam 41 for toggling the rotation of the cam 41 between the open position and the fixed position. The cam 41 includes a wheel body and a rotating shaft 410, wherein the first approaching portion 411, the first departing portion 412, the second approaching portion 413, and the second departing portion 414 are located on an outer side surface of the wheel body. The handle 45 is convenient to hold by hand, and the convenience of operation is improved.

The workbench 1 is provided with a limiting groove 19, the handle 45 is provided with a limiting protrusion 451, the limiting protrusion 451 is inserted into the limiting groove 19, the cam 41 is in an open position, the limiting protrusion 451 is abutted against the side wall of one end of the limiting groove 19, and the cam 41 is in a fixed position, the limiting protrusion 451 is abutted against the side wall of the other end of the limiting groove 19. One end of the handle 45 is connected to the rotation shaft 410.

To improve the degree of automation, in the present embodiment, the opening and closing assembly 4 includes a driving assembly 44, and the driving assembly 44 is disposed on the table 1 and is used for driving the cam 41 to rotate. Specifically, the driving assembly 44 includes a driving member 441, a rack 442 and a gear 443, the driving member 441 is disposed on the workbench 1, the driving rack 442 is slidably disposed on the workbench 1 along the second direction Y and is in transmission connection with an output end of the driving member 441, and the gear 443 is disposed on an input end of the cam 41 and is engaged with the rack 442. The workbench 1 is provided with a slide rail, a slide block is fixed on the rack 442, and the slide block is arranged on the slide rail in a sliding manner. The driving member 441 includes a telescopic cylinder. The driving assembly 44 further includes a first limiting member 444 and a second limiting member 445, the first limiting member 444 and the second limiting member 445 are both disposed on the working platform 1, the first limiting member 444 is used for limiting the extending limit position of the rack 442, and the second limiting member 445 is used for limiting the retracting limit position of the rack 442.

Wherein, the driving assembly 44 further comprises a first limit block 446 and a second limit block 447, the first limit block 444 comprises a first limit screw, the second limit block 445 comprises a second limit screw, the first limit block 446 and the second limit block 447 are all screwed to the workbench 1, the first limit block 446 is provided with a first limit screw hole, the second limit block 447 is provided with a second limit screw hole, the first limit wheel screw is screwed to the first limit screw hole, the second limit screw is screwed to the second limit screw hole, and the first limit screw and the second limit screw are respectively used for limiting two limit positions of the rack 442. The nut of the first limit screw and the nut of the second limit screw are arranged oppositely and used for limiting two limit positions of the rack 442 respectively. Preferably, the rack 442 is provided with a fixing block 4421, and in a state where the rack 442 is located at two extreme positions, both ends of the fixing block 4421 can be respectively abutted against nuts of two limit screws. In this embodiment, the working platform 1 is disposed on the base 17 through the supporting rod 18, and the driving assembly 44 is located between the base 17 and the working platform 1.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Centre gripping frock, its characterized in that includes:

the workbench (1) is provided with a working position, and the working position is used for placing a workpiece (100);

a first clamping assembly (2) capable of clamping or releasing the workpiece (100) in a first direction (X);

a second clamping assembly (3) capable of clamping or releasing the workpiece (100) in a second direction (Y);

an opening and closing assembly (4), wherein the opening and closing assembly (4) comprises a cam (41), the cam (41) can rotate between an opening position and a fixing position, and the first clamping assembly (2) and the second clamping assembly (3) are in a releasing state under the condition that the cam (41) is located at the opening position; the cam (41) is positioned at the fixed position, and the first clamping assembly (2) and the second clamping assembly (3) are both in a clamping state;

the first direction (X) is perpendicular to the second direction (Y).

2. The clamping tool according to claim 1, wherein the worktable (1) is provided with a first stop portion (11), the first clamping assembly (2) comprises a first clamping member (21), and the first clamping member (21) is slidably arranged on the worktable (1) along the first direction (X) and can be close to or far away from the first stop portion (11); and

workstation (1) is equipped with second backstop portion (12), second centre gripping subassembly (3) include second holder (31), second holder (31) are followed second direction (Y) slide locate workstation (1), and can be close to or keep away from second backstop portion (12).

3. The clamping tool according to claim 2, characterized in that the first clamping assembly (2) comprises a first elastic member (22), the first elastic member (22) is arranged between the first clamping member (21) and the worktable (1) and used for enabling the first clamping member (21) to approach the first stopping portion (11); and

the second clamping assembly (3) comprises a second elastic piece (32), and the second elastic piece (32) is arranged between the second clamping piece (31) and the workbench (1) and used for enabling the second clamping piece (31) to approach the second stopping part (12);

the second elastic member (32) provides an elastic force smaller than that provided by the first elastic member (22).

4. The clamping tool according to claim 3, wherein the opening and closing assembly (4) comprises a first lever (42), the first lever (42) is rotatably arranged on the workbench (1), one end of the first lever (42) is poked, and the other end of the first lever (42) can drive the first clamping piece (21) to be far away from the first stopping portion (11); and

the opening and closing assembly (4) comprises a second lever (43), the second lever (43) is rotatably arranged on the workbench (1) and used for poking one end of the second lever (43), and the other end of the second lever (43) can drive the second clamping piece (31) to be far away from the second stopping portion (12).

5. The clamping tool according to claim 4, characterized in that one end of the first lever (42) is provided with a first toggle pin (421), the first clamping member (21) is provided with a first toggle groove (211), and the first toggle pin (421) is partially positioned in the first toggle groove (211) and can be abutted against the groove wall of the first toggle groove (211); and/or

One end of the second lever (43) is provided with a second toggle pin (431), the second clamping piece (31) is provided with a second toggle groove (311), and the second toggle pin (431) is partially positioned in the second toggle groove (311) and can be abutted against the groove wall of the second toggle groove (311).

6. The clamping tool according to claim 2, wherein the workbench (1) is provided with a first sliding chute (13), the first clamping piece (21) is slidably arranged in the first sliding chute (13), and a first cover plate (23) is arranged on the workbench (1) and covers a notch of the first sliding chute (13); and/or

Workstation (1) is equipped with second spout (14), second holder (31) slide locate in second spout (14), second apron (33) are located workstation (1), and the lid is located the notch of second spout (14).

7. The clamping tool according to any one of claims 1 to 6, wherein the cam (41) comprises a rotating shaft (410) and a first approaching portion (411), a first far portion (412), a second approaching portion (413) and a second far portion (414) which are arranged in the circumferential direction of the rotating shaft (410) in a winding mode and are sequentially arranged, the first far portion (412) drives the first clamping assembly (2) to release the workpiece (100) when the cam (41) is located at the opening position, and the second far portion (414) drives the second clamping assembly (3) to release the workpiece (100); under the state that cam (41) is located the fixed position, first portion (411) that is close to drives first centre gripping subassembly (2) and presss from both sides tight work piece (100), second portion (413) that is close to drives second centre gripping subassembly (3) and presss from both sides tight work piece (100), the circular arc radius between first portion (411) that is close to with first portion (412) of keeping away from is greater than the circular arc radius between second portion (413) that is close to with second portion (414) of keeping away from.

8. The clamping fixture according to claim 7, characterized in that the opening and closing assembly (4) comprises a handle (45), and the handle (45) is arranged on the rotating shaft (410) and used for stirring the cam (41) to rotate between the opening position and the fixing position.

9. The clamping tool according to claim 7, wherein the opening and closing assembly (4) comprises a driving assembly (44), and the driving assembly (44) is arranged on the workbench (1) and used for driving the cam (41) to rotate.

10. The clamping tool of claim 9, wherein the driving assembly (44) comprises a driving member (441), a rack (442), and a gear (443), the driving member (441) is disposed on the working platform (1), the rack (442) is slidably disposed on the working platform (1) along the second direction (Y) and is in transmission connection with an output end of the driving member (441), and the gear (443) is disposed on an input end of the cam (41) and is engaged with the rack (442).

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